Key ring



FIG. 1 is a top plan view of an embodiment of a key ring showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a second side view thereof. 

The ornamental design for a key ring, as shown and described. 